Electrochemical fabrication of copper-containing metal–organic framework films as amperometric detectors for bromate determination. Issue 18 (7th April 2016)

• Record Type: Journal Article
• Authors: Shi, Erbin; Zou, Xiaoqin; Liu, Jia; Lin, Huiming; Zhang, Feng; Shi, Shaoxuan; Liu, Fenghua; Zhu, Guangshan; Qu, Fengyu
• Is Part Of: Dalton transactions. Volume 45:Issue 18(2016)
• Page Start: 7728
• Page End: 7736
• Publication Date: 2016-04-07
• Subjects: Chemistry, Inorganic -- Periodicals; Chemistry, Physical and theoretical -- Periodicals; Chemistry, Inorganic -- Periodicals; 546.05
• DOI: 10.1039/c5dt04229a
• Languages: English
• ISSNs: 1477-9226

Abstract

Abstract : An electroactive metal–organic framework film (NENU-3) onto a copper electrode has been prepared by the facile electrochemical plating strategy. Abstract : A facile electrochemical plating strategy has been employed to prepare the electroactive metal–organic framework film (NENU-3) onto a copper electrode in the acid electrolyte containing 1, 3, 5-benzenetricarboxylic acid (H3 BTC) and phosphotungstic acid (PTA). The as-made NENU-3 films have been characterized using powder X-ray diffraction (PXRD), scanning electron microscopy (SEM), Fourier transform infrared (FT-IR) spectroscopy and thermogravimetric analyses (TGA). These analyses indicate that NENU-3 films have high phase purity and high stability. Further, different electrochemical techniques are utilized for measuring the electrochemical behaviors of the NENU-3 film electrodes. Accordingly, the kinetic parameters of a NENU-3 film electrode towards the electrocatalytic reduction of bromate are obtained, including the electron transfer coefficient ( α ), the catalytic rate constant ( k s ), and the diffusion coefficient ( D ). The film electrodes present excellent electrocatalytic ability for the bromate reduction, and can be used successfully for the amperometric detection of bromate. Under the optimized conditions, the proposed sensor exhibits a wide linear range (0.05–72.74 mM) and a lower detection limit (12 μM) measured by chronoamperometry (CA). Moreover, the films possess high electrochemical stability and strong anti-interference capability in the bromate detection process. It has been demonstrated that the electrochemical plating method reported here offers a reliable and efficient way to fabricate MOF films on conductive substrates for bromate detection.